State of the Environment Report/Alarming air quality in Albania, a problem for Tirana and Elbasan
A report compiled on the state of the environment assesses...
A report compiled on the state of the environment assesses...

Building a human heart from scratch in the laboratory still remains one of the greatest goals of all experts engaged in biomedical engineering, a goal that would solve the huge problem that exists in the field of heart transplants. with the absence of this vital organ for human life.
But as a statement from Harvard's John A. Paulson School of Engineering and Applied Sciences (SEAS) explains, to achieve such a goal, all the sensitive structures and mechanisms that regulate the heart must be perfectly replicated. to man.
Dhe është një proces shumë i vështirë për t’u riprodhuar, sidomos lëvizja që bën një zemër që rreh. Ekspertët besojnë se kjo lëvizje delikate është në të vërtetë shumë e rëndësishme për pompimin e gjakut. Por deri më sot nuk kanë qenë në gjendje ta tregojnë arsyen.
Pasi është e vështirë të krijohen zemra biologjikisht të njëjta me tonat, dhe që të kenë struktura dhe rreshtime të ngjashme. Gjithsesi ekipi i bioinxhinierisë në SEAS, ka hedhur hapin e parë të rëndësishëm në këtë drejtim.
Studiuesit njoftojnë se kanë ndërtuar modelin e parë biohibrid të një barkusheje të një zemre njerëzore të kompletuar me qeliza rrahëse të zemrës, të rreshtuara në mënyrë spirale. Pikërisht përmes kësaj barkusheje të re artificiale, studiuesit ishin në gjendje të tregonin se lëvizja përdredhëse, dhe shtrirja e muskujve rrisin gjakun që barkushja mund të pompojë.
Studiuesit përdorën një teknikë të prodhimit të indeve të quajtur Lëvizja Rrotulluese e Përqendruar (FRJS).
Me këtë teknikë ata kanë prodhuar fibra të përafruara në spirale dhe me diametra të ndryshëm, të gjitha shumë të vogla dhe me një gjatësi disa nanometra. Metoda është përshkruar në detaje në një studim që u botua së fundmi në revistën “Science”.
“Kjo punë është një hap i madh përpara sa i përket biofabrikimin të organeve, dhe na çon më pranë synimit tonë përfundimtar për të ndërtuar nga e para në laborator një zemër njerëzore për transplantim”- thotë Kit Parker, profesor i bioinxhinierisë dhe fizikës së aplikuar SEAS dhe një nga autorët e studimit.
Meanwhile, the researchers demonstrated that theoretically, the process they used is scalable. So it can also be used to create a life-size human heart. They have not yet tried the latter, as billions of cardiomyocytes, heart muscle cells, must be used, an amount that, at least for the time being, scientists are not yet able to obtain.
Translated and adapted by CNA.al
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